MOUNTING OPTIONS:
CAUTION:
The following figures show the maximum number of field wires (conductors) that can enter the backbox used with each mounting option. If these
limits are exceeded, there may be insufficient space in the backbox to accommodate the field wires and stresses from the wires could damage the product.
CAUTION:
Check that the installed product will have sufficient clearance and wiring room prior to installing backboxes and conduit, especially if sheathed
multiconductor cable or 3/4" conduit fittings are used.
Although the limits shown for each mounting option comply with the National Electrical Code (NEC), Cooper Wheelock recommends use of the largest backbox option
shown and the use of approved stranded field wires, whenever possible, to provide additional wiring room for easy installation and minimum stress on the product from
wiring.
Figure A
FLUSH (4" BOX)
#8-32 SCREWS
4" SQ. X 2-1/8"
DEEP BACKBOX
SCREW COVERS
8
4
8
8
AWG #18 AWG #16 AWG #14 AWG #12
MAXIMUM NUMBER OF CONDUCTORS
Figure B
8
8
8
8
AWG #18 AWG #16 AWG #14 AWG #12
MAXIMUM NUMBER OF CONDUCTORS
#6-32 SCREWS
SCREW COVERS
FLUSH (2-GANG BOX)
2-GANG x 3-1/2"
DEEP BACKBOX
Figure C
8
8
8
8
AWG #18 AWG #16 AWG #14 AWG #12
MAXIMUM NUMBER OF CONDUCTORS
WOOD
#8-18 SCREWS
SCREW COVERS
SCREWS
SURFACE MOUNTING
INDOOR/OUTDOOR
BACKBOX (IOB)
Figure D
8
8
8
8
AWG #18 AWG #16 AWG #14 AWG #12
MAXIMUM NUMBER OF CONDUCTORS
#8-18 SCREWS
SCREW COVERS
CONCEALED CONDUIT MOUNTING
INDOOR/OUTDOOR
BACKBOX (IOB)
EXISTING
BOX
Figure E
8
8
8
8
AWG #18 AWG #16 AWG #14 AWG #12
MAXIMUM NUMBER OF CONDUCTORS
RETROFIT PLATE MOUNTING
SCREW COVERS
#8-32 SCREWS
BOX
EXISTING FSB
PLATE
RETROFIT
Figure F
8
8
8
8
AWG #18 AWG #16 AWG #14 AWG #12
MAXIMUM NUMBER OF CONDUCTORS
SURFACE OR SEMI-FLUSH (4" X 2-1/8" BOX)
DBB OR 4" SQ. X 2-1/8"
DEEP BACKBOX
ISP EXTENDER
#8-32 SCREWS
SCREW COVERS
Figure G
8
4
8
8
AWG #18 AWG #16 AWG #14 AWG #12
MAXIMUM NUMBER OF CONDUCTORS
SURFACE OR SEMI-FLUSH (4" X 1-1/2" BOX)
DBB OR 4" SQ. X 1-1/2"
DEEP BACKBOX
ISP EXTENDER
#8-32 SCREWS
SCREW COVERS
MOUNTING PROCEDURES:
1.
The MT can be flush mounted to a 100mm backbox (Fig. A) or double-gang backbox (Fig. B). It can also be surface mounted to a indoor/outdoor backbox (Figs.
C & D). It can also be used with a retrofit plate (Fig. E) or with an ISP extender (Figs. F & G). Mounting hardware for each mounting option is supplied.
2.
Conduit entrances to the backbox should be selected to provide sufficient wiring clearance for the installed product. Do not pass additional wires (used for other
than the signaling appliance) through the backbox. Such additional wires could result in insufficient wiring space for the signaling appliance.
3.
The knock-out opening on the outdoor backbox is sized for a ½” conduit and matching connector. Be sure that a proper watertight conduit fitting is used to
connect the backbox for outdoor/severe environment applications.
4.
When terminating field wires, do not use more lead length than required. Excess lead length could result in insufficient wiring space for the appliance.
5.
Use care and proper techniques to position the field wires in the backbox so that they use minimum space and produce minimum stress on the product. This is
especially important for stiff, heavy gauge wires and wires with thick insulation or sheathing.
6.
Connect field wires to the MT terminal block (polarity must be observed). Bend the field wires up 90
°
at the connection to the terminal block.
7.
Carefully push the field wires into the backbox by hand. Press the MT to the backbox, verifying that it is seated and aligned correctly.
8.
Fasten the MT to the backbox using the screws supplied.
9.
WARNING: THIS UNIT MUST BE MOUNTED ON A FLAT SURFACE, SO THAT THE SURFACE COVERS THE ENTIRE BACK SURFACE OF
THE BACKBOX. WHEN USED IN AN OUTDOOR APPLICATION OR A NEMA 3R APPLICATION, USE WEATHER PROOF RATED CONDUIT
FITTING ON ALL KNOCKOUTS OF THE BACKBOX.
WARNING: THE MTWP STROBE APPLIANCE IS A “FIRE ALARM DEVICE – DO NOT PAINT”.
WARNING: THE 135cd, 185cd AND 177cd SETTINGS ARE LISTED FOR USE IN SLEEPING OR NON-SLEEPING AREAS WHEN INSTALLED IN
ACCORDANCE WITH APPROPRIATE NFPA STANDARDS AND THE AHJ.
WARNING: WHEN INSTALLING STROBES IN AN OPEN OFFICE OR OTHER AREAS CONTAINING PARTITIONS OR OTHER VIEWING
OBSTRUCTIONS, SPECIAL ATTENTION SHOULD BE GIVEN TO THE LOCATION OF THE STROBES SO THAT THEIR OPERATING EFFECT CAN BE
SEEN BY ALL INTENDED VIEWERS, WITH THE INTENSITY, NUMBER, AND TYPE OF STROBES BEING SUFFICIENT TO MAKE SURE THAT THE
INTENDED VIEWER IS ALERTED BY PROPER ILLUMINATION. FAILURE TO DO SO COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY
OR DEATH TO YOU AND/OR OTHERS.
P84870E
Sheet 5 of 6
